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Code Issues Releases Wiki Activity

Serialise sparse arrays into JSON (#685)

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This commit is contained in:
FensieRenaud
2021-01-18 17:44:39 +01:00
committed by Jummit
parent 9c48c99be7
commit 1710ad9861
2 changed files with 109 additions and 2 deletions
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12
src/main/resources/data/computercraft/lua/rom/apis/textutils.lua
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@@ -381,6 +381,7 @@ local function serializeJSONImpl(t, tTracking, bNBTStyle)
local sArrayResult = "["
local nObjectSize = 0
local nArraySize = 0
local largestArrayIndex = 0
for k, v in pairs(t) do
if type(k) == "string" then
local sEntry
@@ -395,10 +396,17 @@ local function serializeJSONImpl(t, tTracking, bNBTStyle)
sObjectResult = sObjectResult .. "," .. sEntry
end
nObjectSize = nObjectSize + 1
elseif type(k) == "number" and k > largestArrayIndex then --the largest index is kept to avoid losing half the array if there is any single nil in that array
largestArrayIndex = k
end
end
for _, v in ipairs(t) do
local sEntry = serializeJSONImpl(v, tTracking, bNBTStyle)
for k = 1, largestArrayIndex, 1 do --the array is read up to the very last valid array index, ipairs() would stop at the first nil value and we would lose any data after.
local sEntry
if t[k] == nil then --if the array is nil at index k the value is "null" as to keep the unused indexes in between used ones.
sEntry = "null"
else -- if the array index does not point to a nil we serialise it's content.
sEntry = serializeJSONImpl(t[k], tTracking, bNBTStyle)
end
if nArraySize == 0 then
sArrayResult = sArrayResult .. sEntry
else